An object is thrown downward with an ini-
tial speed of 19 m/s from a height of 71 m
above the ground. At the same instant, a
second object is propelled vertically up from
ground level with a speed of 47 m/s.
At what height above the ground will the
two objects pass each other? The acceleration
of gravity is 9.8 m/s2.
Answer in units of m.